Deferred Compensation (Details) - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Jan. 31, 2024 |
Jan. 31, 2023 |
Jan. 31, 2022 |
|
| Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items] | |||
| Costs to obtain a contract | $ 210,000,000 | $ 133,000,000 | |
| Amortization of costs to obtain a contract | 140,000,000 | 138,000,000 | $ 118,000,000 |
| Impairment loss | 0 | 0 | $ 0 |
| Rabbi Trust | |||
| Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items] | |||
| Deferred compensation liability | 100,000,000 | 86,000,000 | |
| Deferred compensation liability, current | 10,000,000 | 7,000,000 | |
| Deferred compensation liability, non-current | $ 90,000,000 | $ 79,000,000 | |